Process and apparatus for drawing sheet glass



FEWNGREN ss AND APPARATUS FOR DRAWING SHEET GLASS Filed Jan. 22, 1925 PHO C E il hun gw mico UIL 2;; d iiirimiml?. mii@ um out iE-WS. Suvini No@ 1314334.

in the fiii'nwings U10, numoiiii 8 i'o'fe's 'to ay (irziw poi sslippiiod with iuoltoii gins 9, from wiii'vh Hw grins# sxiisfol; 1U is: vertically {ii-:imi :md than bont into the horizontal ovm' Hw biu'vliiiaf; mil il. more 'fuiy dis- "iified iii the luilmit to dfioliiJm-n above reiwm (0. Tilo lmmmxui 12 I'oiels t0 subsinni'iiiliy The: snow, drive, lirivo connections fm1! Sxif'ipozxting' imi-ainsi ioi tho improved width lilvziii'ii'iiini'ug mils 13 as employed in Hi@ ('oilmlii patient, so if, is not downed necessary to fui-tho (insel-ibo the, same here as the details thereof do not foi-m a part of the promeut. invention.

i'z is to be umfiefrstood that the improved of 'iilii'iii imii'tz-iiiiing device is not wi @so iiw ivf-ll-kmwii oliu n process fixmvii'ip: silent 171; but may Je used in wimriwcion wiifii mwst amy Shoot p; ass drawing ommen. The i-oliq 155 am, iailiiisttantiaily o io ioiis; is :i simula i into wiiioh im end oi :im (Irw :md suf'ipoiting Shaft 16 is :'ffiowfhromiodly iiioiminri. cooling Huid is oii'rfulfimgi- Through ifhri @3h21 its 16 and rolls i i by imams of pipm 'Vi' iii, oif'loi i'o prevent #iw Volk; :1mi Sinits 'Fimo oxidizing, and

minous from, substantially spheroidicelly shaped rotatable rolls enga en le with the edges of said sheet, and coo ing means cooperating with sind rolls adapted for localized cooling of the glass immediately adjacent said sheet edges.

El. lin n sheet glass (li-owing apparatus. means containing ii moss of molte-ii glass, ineens for drawing n sheet ot' lfloss therefrom, .ineens 'for forming :i double bend on the sheet edges, and menno adopted tor loeiilized cooling of the gloss adjacent the sheet edges after being thus formed.

9. ln ii sheet glass width maintaining device, o roll'linvingvsiibstiintially the torni of en oblate spheroid, and means carried b i' one foce thereof for supporting and permitting rotation ot' said roll.

l0. lin ii. sheet glass width maintainingf devine, a. rolly hiiving substantially an oblate spheroidal jforni, n ortion of thel surface thereof' being knurled).

l1. iin a. sheet glass Width maintaining derice, a. rotatable roll having substantially an oblate spliei'oidf'il configuration. the rotation of said roll being about its minor axis.

lf2. ln a. sheet gloss Width maintaining devireA` a rotatable roll having substantially on oblate spheroidal configuration. :ind thix surface thereof beingr kniirled between its flattened lzioes.

ln a sheet 11n-ss width iiiaiiituiniu; lr lefviee, a rotatable roll buying substantially on oblato spheroidiil form, the surface thereot" described by its greatest eircumfereiuie being lmurled.

lel. in a sheetglziss width miiintnimngde vice, a roll having substantially mi oblate sphoroidal form, :i portion ot the surface ereoi between its flattened faces being lrnnrled, and said roll rotatable about its minor anis. Y

15. In a` sheet glass Width maintaining de Vice, o rotatable roll having suhstnntially an obliite spheroidal form7 and n knurled zone bisected by. the rolls equator, said roll rotating about its minor axis.

16. The combination with n sheet glass drawing apparatus and rotatable sheet edge gripping rolls of un adjustable cooling means 'for loealizing the effect thereof upon i the gloss iiiiiiiedizitely adjacent the sheet edges and means for adjusting the said cool iner means independently of siiid edge grip ping rolls. i

li'. The combination with a sheet glass diuwing: apparatus und sheet edge gripping device, of un adjustable means for cooling either side of the sheet und which localizes said voeling upon the sheet immediately ndjiicent the ed s thereof.

18. In :i s eet glass drawing uppiirntu, means coiitainiin n muss of molten loer, means for drawing a sheet of gloss t inrefrom, and a pair of rolls having isulisitnlitinlly the forni of obliite spheroids engaging' the sheet edges,

19. In a sheet glass width maintaining clevice, including a lient absorbing member, a pliirnlity of cooperating knurled rolls haviupr substantially the form of oblate sphei-olds, und means for positively driving said ro ls.

E20. The process of reducing breakage in the edges of n continuously drown sheet of glass, consisting :in forming two arallel bends in the sheet edges, by chilling the gloss formed on each side of the lmurled gripped portion of gloss in said sheet edges.

2l. The process of vof a tint drawn sheet o glass in i1 leer, consisting in retaining more heat and giving more plasticity to the border glass by formf ing two parallel thickened portions at eachv edge of lthe sheet.

Biomed :it Toledo, in the county of Lucho, and i tate of Ohio, this 19th day of January, 192e.

ENOCH T. FERNGREN.

reventing breakage 

